Weather warnings
Jul
10
Weather Warning
Tropical Wave 14 to Pass Over Costa Rica This Friday
July 10, 2025
04.30 p.m.
Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...
Jul
08
Informative Weather Notice
Sahara dust over the country
July 08th, 2025
9:50 a.m.
Diagnosis: Increases in atmospheric pressure in the Caribbean Sea accelerate the trade winds over the basin, as well as over central and northern Spain. Furthermore, a dry, stable air mass...
Jul
07
Weather Warning
Heavy downpours during the afternoon in the Pacific and northern regions
July 07th, 2025
10.40 a.m.
Discussion: Tropical Wave 13 is located in western Costa Rica, close to entering the Pacific Ocean. Although it is a weak wave, its interaction with the Intertropical Convergence Zone increases...
Jul
06
Aviso Meteorológico
Efectos de la onda tropical #13 en el país este domingo y lunes
06 de julio de 2025
11.25 am
Diagnóstico: La onda tropical #13 se localiza este domingo al oeste de Panamá, generando inestabilidad en el mar Caribe frente a la costa costarricense, lo que favorece lluvias en el Caribe Sur...
Jul
01
Weather Warning
Rainy conditions in the Caribbean and Northern Zone this Tuesday and Tropical Wave #12
Jul 01th, 2025
10 am
Diagnosis The strengthening of the trade winds over the central and northern regions of the country has produced wind gusts of up to 50 km/h in areas such as Alajuela this morning. This...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-100920-10.50 am
Sep
10
Weather Warning
Downpours and thunderstorm this Thursday
September 10, 2020
10.55 am
Diagnosis: The Intertropical Convergence Zone remains close to the country, which, added to local factors, such as warm morning temperatures, the entry of sea breezes and disturbances in the upper atmosphere, will favor strong and isolated rainy activity this Thursday.
Forecast: During this afternoon, rains of variable intensity and isolated strong showers with electrical storms and strong winds are expected in regions of the Pacific, the Central Valley and mountains of the North Zone, they are estimated to accumulate between 30-65 mm, possible amounts higher than located. On the other hand, in the mountains of the Caribbean there are scattered rains with amounts between 5-10 mm.
Precipitation is estimated to extend into the early hours of the night in the coastal Pacific, especially in the Central and South Pacific coast, accumulating between 10-50 mm.
Warning: High levels of soil saturation prevail in the North Zone, northwest of the Central Valley, the Nicoya Peninsula and the South Pacific; therefore, special attention is recommended.
Due to the above, the IMN recommends:
• Caution in areas vulnerable to flooding due to sewerage saturation.
• Take shelter in a safe place in case of hearing an electrical storm or perceive strong gusts of wind near the storm clouds, as well as possible fall of tree branches, power lines, among others.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr
Gabriela Chinchilla
Meteorologist
DMSA-IMN
